[pacman-dev] pacman problems

I'am a newbie so please thank you for your patience. Executing pacman -S samba I've this error: failed retriving file 'tdb-1.2.0-1-i686.pkg.tar.gz' But both two mirrors I've in my etc/pacman.d/mirrorlist contain the filename "tdb-1.2.1-1-i686.pkg.tar.xz" where there is a difference about the version 1.2.1 and also in the extension .xz instead of .gz My pacman version is 3.3.3-1 which is the latest. Someone can help me? Thank you. Antonio Grande